channel spacing


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channel spacing

[′chan·əl ‚spās·iŋ]
(communications)
The difference in frequency between successive radio or television channels.

channel spacing

The amount of bandwidth allotted to each channel in a communications system that transmits multiple frequencies such as fiber optics. It is measured as the spacing between center frequencies (or wavelengths) of adjacent channels. See guard band.


Channel Spacing in Optical Fibers
The first 10 Gbps example with 50 GHz spacing has a slight signal overlap, but with 100 GHz, there is none. The first example provides more bandwidth, but the overlap could be enough to cause significant crosstalk. (Illustration courtesy of Jeff Hecht.)
References in periodicals archive ?
The transmitter block consists of 16 individual 10 Gbps transmitters, each operating in frequency range from 196.4 THz to 197.15 THz with 50 GHz channel spacing. Signal power of the signal at the output of each transmitter is equal to 1 mW (0 dBm).
We assume that the transmission bandwidth of a fiber is [C.sub.fiber], the channel spacing based on ITU-T frequency grid of traditional WDM network is [G.sub.WDM] ([G.sub.WDM] = 100 GHz) and EON channel spacing is [G.sub.EON] ([G.sub.EON] << [G.sub.WDM]).
The MxL11xx features built-in Full Spectrum Capture(TM) (FSC(TM)) technology and supports channel aggregation mode, enabling a second channel with any channel spacing to be processed within the same IC.
MPO tools are available in OptiSystem software to optimize the pump powers and frequencies to achieve the target gain to keep the DWDM system with 0.8 nm channel spacing. This multipump optimization is based on nonlinear least square (LSQ) algorithm.
The data from [18] show that when the PV drift reaches 1/3 of the data channel spacing, the bit error ratio (BER) of the transmit channel would increase from [10.sup.-12] to [10.sup.-6], which makes the data channel unable to transmit data correctly.
The power level of FWM products is strongly dependent on channel spacing, fiber dispersion, and core effective area.
Vitex also offers standard athermal AWGs at AAWGs in multiple channels (e.g., 44CH, 48CH, 80CH, 88CH, and 96CH), spectrum (e.g., Gaussian, Semi-flat, and Flat-top), channel spacing (200GHz, 100GHz, 75GHz, and 50GHz), band (C-band, L-band, dual C/L cyclic bands).
In this paper, we have multiplexed 12 WDM quantum channels to generate the aggregate SKR with the channel spacing of 25 and 50 GHz.
WSS is completely reconfigurable by allocating channel spacing and bandwidth dynamically.
Eight channels are available with a channel spacing of 20 MHz and guard spacings of 30 MHz at the band edges in order to meet the stringent FCC restricted band spectral density requirements.
Four-wave mixing (FWM) is one of the phenomena that may lower the effectiveness of the transmitted signal in wavelength division multiplexing (WDM) systems under dense channel spacing and low chromatic dispersion.
Through-hole 49T packaged 10.7, 21.4 and 45MHz MCF devices offer channel spacing of 12.5, 20, 25 and 50kHz with two, four, six and eight poles.